CKAD Observability: Probes, Logging, and Debugging

Question 1

What does a Liveness Probe do when it fails?

Accepted Answer

Restarts the container

Answer

Removes the pod from Service endpoints

Answer

Evicts the pod from the node

Answer

Sends an alert to the cluster admin

Question 2

What is the purpose of a Readiness Probe?

Accepted Answer

To determine if a container is ready to receive traffic

Answer

To restart a container that is stuck

Answer

To initialize a container before app code runs

Answer

To check if the node has sufficient resources

Question 3

Which liveness probe type sends an HTTP GET request to a specified path and port?

Accepted Answer

httpGet

Answer

exec

Answer

tcpSocket

Answer

grpc

Question 4

What does the 'initialDelaySeconds' field in a probe configuration specify?

Accepted Answer

How long to wait after the container starts before the first probe is run

Answer

How long to wait between probe attempts

Answer

How long a probe can run before timing out

Answer

How many seconds before the probe is considered failed

Question 5

Which command streams live logs from a pod named 'web-pod'?

Accepted Answer

kubectl logs web-pod -f

Answer

kubectl logs web-pod --live

Answer

kubectl tail web-pod

Answer

kubectl watch logs web-pod

Question 6

A Startup Probe is used for containers with slow startup times. What happens while the Startup Probe has not yet succeeded?

Accepted Answer

Liveness and Readiness Probes are disabled until the Startup Probe succeeds

Answer

Liveness and Readiness Probes run normally

Answer

The container is killed after 30 seconds

Answer

The pod status shows 'Pending'